IS 10774 : 1993 ( Reaffirmed 1998 ) Indian Standard CORROSION RESISTANT HIGH ALLOY STEEL AND NICKEL BASE INVESTMENT CASTINGS FOR GENERAL APPLICATION SPECIFICATION ( First Revision ) UDC 669-15.018*8 - 194-3 + 669.24 - 145 @ BIS 1993 BUREAU MANAK OF BHAVAN, 9 INDIAN BAHADUR DELHI STANDARDS SHAH 110002 Price Group 4 ZAFAR MARC3 NEW December 1993 Steel Castings Sectional Committee, MTD 17 FOREWORD This Indian Standard ( First Revision ) was adopted by the Bureau of Indian Standards, after the draft finalized by the Steel Castings Sectional Committee, had been approved by the Metallurgical Engineering Division Council. This standard was first published in 1983. While reviewing the standard in the light of the experience gained during these years the committee has decided to revise this Indian Standard. In this revision various clauses have been aligned with the recent standards on steel castings. For the benefit of the purchaser and the manufacturer, typical applications castings specified in this standard have been included in Annex C. In the preparation of this standard, assistance BS 3146 ( Part 2 ) : 1985 Investment castings in metal in corrosion nickel and cobalt base alloys, British Standards Institution. of various grades of has been derived from the following and heat publications: resisting steels, ASTM A743 - 1980 Corrosion - resistant, iron chromium, iron-chromium-nickel, and nickel-base alloy castings for general application, American Society for Testing and Materials. For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2 : 1960 `Rules for rounding off numerical values ( revised )`, The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard. IS 10774 : 1993 Indian Standard CORROSION RESISTANT HIGH ALLOY STEEL AND NICKEL BASE INVESTMENT CASTINGS FOR GENERAL APPLICATION SPECIFICATION ( First Revision ) I SCOPE This standard covers the requirements for corrosion resistant high alloy steel and nickel base investment castings for general applications. 2 REFERENCES The Indian Standards listed in Annex necessary adjunts to this standard. 3 TERMINOLOGY 3.0 For 4 GRADES This standard covers a total of fourteen grades of corrosion resistant high alloy steel and nickel base investment castings for general applications for general engineering purposes. 5 SUPPLY OF MATERIAL 5.1 General requirements relating to supply of these steel castings shall be as laid down in IS 11709 : 1986. 5.2 General requirements relating to the supply of nickel base alloy investment castings shall be as agreed to between the manufacturer and the purchaser. 6 MANUFACTURE The steel for the castings shall be made by electric arc or electric induction or such other processes as may be agreed to between the purchaser and the manufacturer. 7 PARTICULARS ORDERING TO BE SPECIFIED WHILE A are the purpose of this standard, following definitions shall apply. The product of any of the following: the 3.1 Cast ( Melt ) a) One furnace heat, b) One crucible heat, or c) A number of furnace or crucible heats of similar composition mixed in a ladle or tapped in separate ladles and poured simultaneously for making a casting. 3.2 Batch A group of castings of one grade of material, cast from the same melt and heat-treated together under identical conditions. 3.3 Investment Casting This is a casting process in which consumable pattern of wax or thermoplastic or other material is used. The pattern is invested in a refractory slurry to form a mould. After the mould is dried, the pattern is melted or burnt out of the mould cavity. 3.4 Master Heat Metal supplied in cast or wrought form, the chemical composition of which has been established by chemical analysis, and which is remelted into smaller batches for pouring into mould cavity. 1 For the benefit of the purchaser, particulars to be specified while ordering for steel castings to this specification are given in Annex B. 8 CHEMICAL COMPOSITION 8.1 The ladle analysis of steel when carried out either by the method specified in IS 228 and its relevant parts or any other established instrumental/chemical methods shall be as given in Table 1. In case of dispute the procedure given in IS 228 shall be the referee method. However, where the method is not given in IS 228, the referee method shall be as agreed to between the purchaser and the manufacturer. 8.2 The manufacturer shall carry out analysis from a sample of each melt of steel and, if so specified by the purchaser at the time of enquiry and order, shall supply a test certificate of chemical analysis of the sample of steel for each melt. IS 10774 : 1993 8.3 Product Analysis If specified at the time of enquiry and order, the product analysis may be carried out from a test piece or from a casting representing each melt. Drillings for analysis shall be taken from not less than 6 mm beneath the cast surface, and in such a manner as not to impair the usefulness of any casting selected. The permissible variation in product analysis from the limits specified in Table 1 shall be as given in IS 6601 : 1987 and those for nickel base alloys shall be as agreed to between the purchaser and the manufacturer. 8.4 Residual Elements drawings supplied by the purchaser addition of such letters, figures and may be specified. with the marks as 9.2 The purchaser shall specify the tolerances on all important dimensions. On other dimensions, tolerances specified in IS 11166 : 1984 shall apply. 10 FREEDOM FROM DEFECTS 10.1 All castings shall be free from defects that will adversely affect machining or utiliiy of castings. 10.2 When necessary to remove risers or gates by flame or arc or a combination thereof, or by any other process involving intense heat, care shall be taken to make the cut at a sufficient distance from the body of the casting so as to prevent any defect being introduced into the casting due to local heating. Any such operation is to be done before final heat treatmeat. 10.3 In the event of any casting proving defective from foundry causes in the course of preparation, machining or erection, such casting may be rejected notwithstanding any previous certification of satisfactory testing and/or inspection. 11 FETTLING All castings $es;e$ and AND DRESSING shall be properly fettled and all surfaces shall be thoroughly Base 8.4.1 Elements not specified in Table 1 shall not ordinarily be added to the steel and all reasonable precautions shall be taken to prevent contamination from the scrap, etc, to keep them as low as practicable. 8.4.2 Analysis and reporting of the analysis in the test certificate far the residual elements shall be done only when so specified by the purchaser in the enquiry and order. However, the manufacturer shall ensure that the residual elements are within the limits when such limits are specified by the purchaser in the ~enquiry and order. 9 WORKMANSHIP AND FINISH 9.1 The castings shall be accurately accordance with the pattern or Table 1 Chemical moulded in the working Composition Investment of Corrosion Resistant High Alloy Steel and Nickel Castings for General Applications ( Clauses 8.1, 8.3 and-8.4 ) Requirement, Percent* Grade -------Mn Si P S Cr MO Ni v W Co Fe' 0.04 0.04 18/21 8111 0.5 1.5 2.0 0.08 1 0.04 0.04 18/21 2.0 213 8112 1.5 0.08 2 0.04 0.04 18/21 2.0 0.5 9112 1.5 0.08 3t 0.04 0.04 1.5 2.0 _18121 8/11 0.5 0.20 4 0.04 0.04 2.0 1.5 22126 12/15 0.5 0.20 5 0.04 0`04 2.0 2.0 23121 0.20 0.5 19122 6 0.04 1.0 0.04 11.5/14 1.5 1.0 0.15 0.5 7 0.04 1.0 0 04 11*5/14 1.0 3.514.5 0.06 0.40/1.0 8 1.0 1.5 0.04 0.04 11.5/14 1.0 0.210.4 0.5 9 1.5 0.04 0.04 1.5 17121 0.03 9113 213 10 0.04 1.5 1.5 0.04 9113 0.08 18/21 314 11 3.0 0.03 1.5 0.03 14/17 Rem 0.40 12 11.0 I.0 1.5 0.04 0.03 0.12 15.5/20 Rem 16/20 5.25 13 0.40 2.50 7.50 1.0 0.12 0.04 0.03 1.0 1 .O Max Rem 26133 14 0.60 2.50 640 *Maximum, unless range is specified . tGrade 3 shall have a niobium content of not less than 8 times the carbon content and not more than 1.0 percent. If niobium plus tantalum alloy in the approximate Nb,Ta ratio of 3:l is used for stabilizing this grade, the total niobium plus tantalum content shall not be less than nine times the carbon content and shall not exceed 1.1 percent. ___---c_----w`C 2 IS x0774 : 1993 12 HEAT TREATMENT 12.1 The castings shall be heat-treated in a properly constructed furnace, having adequate means of temperature control which shall permit the whole of the castings being uniformly heated to the necessary temperature. All castings shall be suitably heat treated so as to attain the specified mechanical properties. 13.3 The tensile test shall be carried out in accordance with IS 1608 : 1972. The relevant mechanical properties shall be as given in Table 3. Table 3 Mechanical Properties of High Alloy Steel and Nickel Base Investment Castings for General Application Grade Tensile Strength Min MPa 450 480 480 480 480 450 620 760 Yield Stress Min MPa 190 210 210 210 210 190 450 550 Elongation Min Percent 31 26 26 26 26 26 16 14 Brine11 Hardness Max 12.2 Unless otherwise specified in the enquiry and order or agreed to between the purchaser and the manufacturer, all castings shall be heat treated according to requirement specified in Table 2. 12.3 The test pieces shall be heat treated with the castings they represent. Table 2 Heat Treatment Requirements ( Chuse 12.2 ) Grade Requirements for along 170 170 170 200 200 200 241 - Max Max Max Max Max Max Heat Treatment : : 11 5 6 7 s 10 Heat to 1 040C Min, hold for sufficient time and quench in water or cool rapidly by other means so as to develop acceptable corrosion resistance Heat to 1 090°C Min. hold for sufficient time and quench in water or cool rapidly bv other means so as to develop acceptable corrosion resistance Heat to 950°C Min, air cool and temper at 590°C Min or heat to 790°C Min and air cool Heat to 1040°C Min. hold for sufficient time and cool rapidly so as to develop acceptable corrosion resistance or as ~cast if corrosion resistance is acceptable As cast As agreed to between the purchaser and the manufacturer so as to develop acceptable corrosion resistance 690 480 I1 520 12 480 13 500 l4 500 1 MPa = lN/mmg 10 9 480 210 240 190 320 320 = 1 MN/m% 14 201-255 26 170 Max 22 26 4 6 = O-102 0 kgf/mm*. 13.4 Brine11 Hardness The Brine11 hardness test shall be carried out in accordance with IS 1500 : 1968 and requirements shall conform to those specified in Table 3. 13.5 Impact and Bend Tests If specified in enquiry and order, impact test and bend test .-may also be carried out. The methods of testmg and their requirements shall be as mutually agreed. 13.6 Additional Test If specified in enquiry and order, intergranular corrosion test and metallographic test may be The methods of testing and carried out. acceptance shall be agreed upon between the manufacturer and the purchaser. 14 NON-DESTRUCTIVE TESTS 12 13 14 13 MECHANICAL TESTS 13.1 The mechanical properties specified are those which are to be obtained from test bars cast either separately from or attached to the castings to which they refer and heat treated as given in 12. The test values so exhibited, therefore represent the quality of steel from which the castings have been poured; they do not necessarily represent the properties of the castings themselves. 13.2 Test samples shall be cast as shown in Fig. 1 and tensile test piece shall be prepared as shown in Fig. 2. 13.2.1 By agreement between the purchaser and the manufacturer a different size of test samples and tensile test piece may also be used. 14.1 Non-destructive testing shall be applied if so specified in the enquiry and the order. Under this heading are grouped the tests, which aim at revealing defects which cannot be revealed by a simple visual examination, such as penetrant, magnetic particle, ultrasonic, Xradiographic, or gamma-radiographic inspection; also included under this heading are tests on the surface condition by visual or visual3 Is 10774 : 1993 lOmm- 1Omm + t LB, 65 mm IOmm fkB ?B Keel Block Shape ( Circular or Square Section ) 75mm IA Carrot Shape 1C Clover Load Shape NOTE- All dimensions given are minimum values. FIG. 1 TYPESOF CAST TEST SAMPLES Gauge length = 5 D = 30 = G 9 Parallel length = L: 6 = 33.75 R = O-SD min FIG. 2 tactile examination. The purchaser in the enquiry and order: TENSILE TEST PIECE shall specify which carried The type of non-destructive testing a> he intends to carry out or to have out; e) Whether the manufacturer is or is nut contractually responsible for carrying out the tests. 14.2 u n 1ess otherwise agreed uoon. when nondestructive testing is to-be done, `the castings shall be examined as follows: a) y7;;asonic , b) The area or areas of the casting these tests apply, and the discontinuity, where relevant; to which types of examination as per IS 7666 : as per as per Whether all, or what proportion, castings are to be tested; lity or non-acceptability may be revealed; and of the 4 The severity level defining the acceptabi- b) Magnetic particle IS 3703 : 1980, examination of defects which c) Liquid penetrant examination IS 3658 : 1981, and 4 IS 10774 : 1993 d) Radiographic 1978. examination as per IS 2595 : 14.3 Uuless otherwise agreed upon the following shall be the acceptance standards: a) IS 9565 : L986 for ultrasonic b) IS 10724 : 1990 inspection. c) IS 11732 : 1986 inspection. for for inspection. particle penetrant carried out; the details agreed to between the manufacturer. of the test shall be purchaser and the magnetic liquid 16.2 The castings shall not be peened, plugged or impregnated to stop leakage. However, unless otherwise specified at the time of enquiry and order, rectification and upgradation of a casting by welding may be carried out in accordance with the approved procedures as laid down in the relevant clause of the standard. 17 METHOD OF SAMPLING 17.1 The method of sampling the steel castings for the purpose of chemical analysis and mechanical tests including re-test shall be in accordance with IS 6907 : 1992. 18 MARKING 18.1 Each casting shall be legibly the following: d) IS 12938 : 1990 for radiographic inspection ( Under Print ). NOTE - Tn case of austenitic grades.. ultrasonic inspection and magnetic pa_rticle inspectlon may not ordinarily be feasible. 15 REPAIR OF CASTINGS 15.1 Unless otherwise specified by the purchaser in the enquiry and order, castings may be rectified by welding. All repairs by welding shall be carried out in accordance w~ith the procedure laid down in IS 5530 : 1987. If castings have been subjected to non-destructive testing by agreement between the purchaser and the manufacturer, the castings shall be re-examined in the area of repair following any rectifying operation performed on the castings. 15.2 To form the basis of an agreement between the pu;chaser and the supplier in this-respect classification where relevant, the following shall apply concerning the extent of repair: Weld repair involving a depthnot exceea> ding 20 percent of wall thickness or 25 mm, whichever is lower, shall minor repair. be termed as a marked with a) The number or identification mark by which it is possible to trace the melt and the heat-treatment batch from which it was made; b) The manufacturer's and initials or trade-mark; c) Other identification marks in accordance with any agreement between the purchaser and the manufacturer. NOTE - `It is recommended that a minimum marking be used'. 18.2 By agreement between the purchaser and the manufacturer, castings complying with the requirements of this standard may, after inspection, be legibly marked with an acceptance mark. 18.2.1 BIS Certification Marking The use of the Standard Mark is governed by the provislons of Bureau of Indian Standards Act, 1986 and the Rules and Regulations made thereunder. The details of conditions under which the licence for the use of Standard Mark may be granted to manufacturers or producers may be obtained from the Bureau of Indian Standards. b) Any weld repair exceeding the above shall be termed as a major repair. Further any single repair having an area exceeding 250 mm square for every millimeter of wall thickness shall also be deemed to be a major repair, regardless ii;!: considerations mentioned in ( a ) TEST 16 HYDRAULIC 16.1 When so specified enquiry and the order, by the purchaser in the hydraulic test shall be 1s 10774 : 1993 ANNEX A ( Clause 2 ) LIST OF REFERRED INDIAN STANDARDS IS No. 228 1500: 1983 Title ZS No. 6(jOl : 1992 Title Methods for chemical analysis of steels ( second revision ) Methods for brine11 hardness test for metallic materials ( second revision ) 6907 : 1992 7666 : 1988 1608: 1972 revision ) Methods for tensile of steel products testing ( first 1757 : 1988 Method for charpy impact test ( V-notch ) for metallic material ( second revision ) Code of practice for radiographic testing (first revision ) Code of practice for liquid penetrant flaw detection (first revision ) 9565 : 1986 10724. ,g90 ' 2595 : 1978 3658 : 1981 11709 : 1986 3703 : 1980 Code of practice for magnetic particle flaw detection (first revision ) deviations in Permissible chemical composition for product analysis of steel castings ( jirst revision ) Methods of sampling steel castings ( second revision ) Recommended procedure for examination of ultrasonic ferritic castings of carbon and low alloy steel Acceptance standards for ultrasonic inspection of steel castings ( jirst revision ) standards for Acceptance magnetic particle inspection of steel castings Technical delivery conditions for investment castings of steel Acceptance standards for dye penetrant inspection of steel castings Acceptance radiographic steel castings standards inspection for of 11732 : 1986 5530 : 1987 Code of procedure for repair and rectification of steel castings by metal arc welding process (first revision ) 12938 : 1990 ANNEX INFORMATION B-l BASIS FOR ORDER While placing an order for the purchase of steel castings covered by this standard, the purchaser should specify the following: a) Material specification; b) Drawing or reference number of the pattern ( if supplied by the purchaser ), along with a copy of the drawing; TO BE SUPPLIED B BY THE PURCHASER c) Optional/additional any; tests required, if ( Clause 7 ) d) Whether the castings are to be inspected and tested in the presence of the purchaser's representative; e) Condition of delivery; f) Any special requirement; and g) Test report, if required. 6 IS 10774: 1993 ANNEX C ( See Foreword ) C-l For the guidance of the manufacturer and of castings, the users, typical applications covered by this standard are given below: Application General service pump, valves for chemical processing, oil refineries, textile dyeing, food machinery, architectural trim, fuel jets, fuel valves, engine supports. Pumps, valves, fittings in reducing acids, paper mill equipment, process industries, sea water service. Similar to grade I but especially useful where parts cannot be heat-treated after welding. Similar to grade service. Paper pumps, ments, fittings, I but for less severe Grade 8 Components tance and required. Application where good corrosion resisresistance to abrasion is and corrosion resis- Grade 1 0 10 Valve trim abrasion tance applications. 2 Simi!ar to grade 2 but used where resistance to intergranular corrosion also reuired. Similar to grade 2 but used where the corrosion is more chance of pitting severe. This is used in handling corrosive vapours above 400°C. It is mainly used in dairy, chemical, aeronautical, nuclear, petroleum and food processing industries. This alloy~shows outstanding resistance to such highly corrosive chemicals as wet chlorine, strong hypochlorite solutions, ferric chloride and cupric chloride and many of its applications are in handling of these chemicals. These alloys have resistance to hot concentrated hydrochloric acid solutions and wet hydrogen chloride. 11 3 12 4 5 pulp service, digester fittings, impellers, strainers, valves, ornatire wall fittings, hard rail, grills. 13 6 7 Sulphate liquor, cold dilute sulphuric acid service, agitators, fittings. Valves and valve trims, pump parts for power plant and oil refining equipment, sliding or wearing parts. 14 Bureau of Indian Standards BIS is a statutory institution established under the Bureau of Indian Standards promote harmonious development of the activities of stadardization, marking certification of goods and attending to connected matters in the country. Copyright BIS has the copyright of all its publications. No part of these publications may be reproduced in any form without the prior permission in writing of BIS. This does not preclude the free use, in the course of implementing the standard, of necessary details, such as symbols and sizes, type Enquiries relating to copyright be or grade designations. addressed to the Director ( Publicaticns ), BIS. Revision of Indian Standards Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed periodically; a standard along with amendments is reaffirmed when such review indicates that no changes are needed; if the review indicatesthat changes are needed, it is taken up for revision. Users of lndian Standards should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of `BIS Handbook' and `Standards Comments on this Indian Standard may be sent to BIS giving the following Monthly Additions'. reference: Dot : No. M-l-D 17 ( 3855 ) Amendments Amend No. Issued Since Publication of Issue Text Affected Act, and 1986 to quality Date BUREAU Headquarters: Manak Bhavan, 9 Bahadur Shah Zafar Telephones : 331 01 31, 331 13 75 OF INDIAN Marg, STANDARDS 110002 Telegrams ( Common : Manaksanstha to all Offices ) Telephone New Delhi Regional Central Offices : Manak : Bhavan,9 Bahadur Shah Zafar Marg Maniktola NEW DELHI Eastern 110002 VII M, V. I. P. Road, : l/14 C. I. T. Scheme CALCUTTA 700054 : SC0 445-446, Sector I,,~1 331 O1 13 75 3l f37 8499, 37 85 61 `~37 86 26, (53 38 43, 37 86 62 53 16 40 Northern 35-C CHANDIGARH 160036 153 23 84 I-235 02 16, 235 04 42 235 23 15 632 78 58 632 78 92 Southern Western : C. I. T. Campus, : Manakalaya, BOMBAY IV Cross Road, MADRAS 600113 `~235 15 19, 632 92 95, 632 78 91, E9 MIDC, 400093 Marol, Andheri ( East ) Branch : AHMADABAD. FARIDABAD. LUCKNoW. BANGALORE. BHOPAL. BHUBANESHWAR. GHAZIABAD. GUWAHATI. HYDERABAD. PATNA. THIRUVANANTHAPURAM. Printed at Printwell CO-IMBATORE. JAIPUR. KANPUR Printers, Aliparh, India AMEN~DMENT NO. 1 MAY 1996 TO IS 10774 : 1993 CORROSION RESISTANT HIGH ALLOY STEEL AND NICKEL BASE INVESTMENT CASTINGS FOR GENERAL AI'PLICATION - SPEClFlCATLON ( FirstRevision) ( Page 1, clause 3.3 ) -Substitute `33 Investment Casting in a mould shell obtained by with a bonded refractory. The plastic or other material and is to filling the mould with liquid `IS 11166 :1984'. the following for the existing: An investment casting is one that is produced investing ( surrounding ) an expendable pattern expendable pattern may be made of wax, urea, removed by heating or any other process prior metal.' ( Page 2, clause 9.2 ) -Substitute ( Page 3, clause 13.2 ) -Substitute `IS 11166 : 1993'for the following for the existing: `13.2 The thickness or Dia of the As Cast Test Bar is ordinarily to be 18 2 3 mm. However, size other than this may be agreed to between the manufacturer and the purchaser.' (Page 3, clause 13.2.1 ) ( Page 4, Figurer Delete. Delete. Substitute `IS 7666 : 1988' for `IS 7666 : 1 and 2 ) ] - [ Page 4, clause 14.2(a) 1975'. [ Page 5, clause 14.3 (d), line 2 ] - Delete `( Under Print )`. (MTD17) Reprography Unit, BIS, New Delhi, India